<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <!-- <input type="checkbox" v-model="isAll" /> -->
            <input type="checkbox" v-model="isAll" />
            <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>

      <list :goodList="goodList" @add="add" @reduce="reduce" @del="del"> </list>

      <tfoot>
        <combine :nums="nums"></combine>
      </tfoot>
    </table>
  </div>
</template>

<script>
import list from './components/list.vue'
import combine from './components/combine.vue'
export default {
  components: {
    list,
    combine,
  },

  data() {
    return {
      // nums: 0,
      nums2: 0,
      goodList: [
        {
          name: '诸葛亮',
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: '蔡文姬',
          price: 1500,
          num: 1,
          checked: false,
        },
        {
          name: '妲己',
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: '鲁班',
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    }
  },
  methods: {
    // 数量加减
    add(i) {
      this.goodList[i].num = this.goodList[i].num + 1
    },
    reduce(i) {
      this.goodList[i].num = this.goodList[i].num - 1
    },
    // 删除
    del(i) {
      this.goodList.splice(i, 1)
    },
  },
  computed: {
    nums() {
      let a = 0
      this.goodList.forEach((item) => {
        if (item.checked) {
          a += item.price * item.num
        }
      })
      return a
    },
    isAll: {
      set(val) {
        this.goodList.forEach((item) => {
          return (item.checked = val)
        })
      },
      get() {
        return this.goodList.every((item) => {
          return item.checked
        })
      },
    },
  },
}
</script>

<style></style>
